Sofa



FIG. 1 is a right side elevational view of sofa showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a first perspective view thereof;

FIG. 7 is a second perspective view thereof, in an alternate position; and,

FIG. 8 is a third perspective view thereof, in a second alternate position. 

The ornamental design for sofa, as shown and described. 